How to do it more efficiently?
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Ilham Hardy
le 23 Déc 2014
Commenté : Ilham Hardy
le 24 Déc 2014
Hi,
In my script, this piece of code is taking about 70% of processing time.
The idea is to create uniform timestamp, it searches the time array and compare it with the Tsynced. if there is no similar entry, the other parameters to NaN.
Is there anyway to change the script below without using find function? Even better if no for-loop is required.
Code:
for ix = 1:length(time_synced)
[r,~,~] = find(cCells(:,1)==time_synced(ix),1,'first');
if isempty(r)
curArr(ix,:) = NaN;
else
curArr(ix,:) = cCells(r,:);
end
end
Thanks.
0 commentaires
Réponse acceptée
Roger Stafford
le 23 Déc 2014
See if this is faster:
[t,ic] = ismember(time_synced,cCells(:,1));
curArr(t) = cCells(ic);
curArr(~t) = NaN;
Note: This assumes that 'time_synced' and 'curArr' are vectors of the same length.
2 commentaires
Plus de réponses (1)
Andrei Bobrov
le 23 Déc 2014
[l0,ii] = ismember(time_synced,cCells(:,1));
out = nan(numel(time_synced),size(cCells,2));
out(l0,:) = cCells(ii(l0),:);
Voir également
Catégories
En savoir plus sur Creating and Concatenating Matrices dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!